Now, to be a bit more clear even though the install alongside option came I chose the manual partitioning just so I can have swap and a separate home partition. And for the sake of information, I installed Ubuntu 18.04
Now what I created this topic is to ask that even tho I removed Ubuntu and everything is working fine I’m still seeing Ubuntu in my UEFI Boot sequence option in the BIOS as in the picture below.
No in my opinion should not be a problem, as what it’ll do when you reinstall Ubuntu is use the same UEFI link. I still have Manjaro in my UEFI list, from two years ago. When I upgraded from Linux Mint Ulyssa to Uma from ISO it used the same UEFI, I unfortunately came back to Ulyssa, found bugs in Uma on my machine anyway and it used the same UEFI link. I have Windows 10 on a separate SSD dual boot, with Linux Mint booting first.
In your picture above it has delete underneath the ticked boxes. Untick the Windows UEFI, keep Ubuntu ticked and push delete. You’ll have to delete the Fat32 file on the Ubuntu partition of your hard drive. You can install Gparted in Windows and delete it that way. So make sure you delete the Fat32 on Ubuntu side of your hard drive first. Your Windows will still be safe, for as long as you don’t touch the NTFS partition on your hard drive. Also after deleting the UEFI out of your bios remember to save by pushing F10 on your keyboard, you probably know this already, but I have seen a lot of people not save their bios settings afterwards and then they wonder why nothing has changed?